摘要
用二次回归正交设计研究了全玉米－豆饼饲粮的粗蛋白（ＣＰ）水平（ｘ＿１）和豆饼（占饲粮蛋白％）比例（ｘ＿２）对３周龄断奶至８周龄的仔猪日增重（ＡＤＧ）、饲料利用率（Ｆ／Ｇ）、腹泻指数（ＤＩ）、血清脲素氮（ＳＵＮ）和木糖吸收率的影响。除木糖吸收率外（随ＣＰ和ＳＢＭ增加，木糖吸收率下降），其余指标的二次回归方程均达显著或极显著水平。方程如下：分析表明，在ＣＰ１６～２４％下，调整豆饼比例可使仔猪保持相近的生长速度和饲料利用率；高蛋白腹泻的实质是过敏性腹泻；当腹泻指数高到７７时，日增重和饲料利用率下降。推荐３周龄断奶仔猪玉米－豆饼饲粮中适宜蛋白水平为２４％，豆饼比例为６０％。
An orthogonal design of quadratic regression was used to study the effects of CP(x_1)and soybean meal(x_2)level(as the percentage of deitary protein)of corn-sovbean-meal diet on postweaning performances of pigs weaned at 3 week old.Averagedaily gain(ADG),feed conversion rate(F/G),diarrhoea index(DI),serum ureanitrogen(SUN)and xylose absorption(XA) were determined in the experimental periodof five weeks.Except XA,which appeared to decrease as CP and SBM increased,allother criteria responded quadratically to the change of CP and SBM(P<0.05,or<0.01).The quadratic regression equations were as follows:Analysis of these equations indicated that by adjusting the SBM proportion, 16～24%CP could provided pigs with similar ADG and F/G.Diarrhoea produced by high levelof dietary protein was essentially the result of intestinal hypersensitivity to antigen.Weight gain and feed conversion rate decreased when DI rose to 77 score.It wasrecom mended that the optium CP level was 24%,60% of which come from SBM,indiet for pigs weaned at 3 week old and composed of only corn and SBM.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
1995年第6期508-514,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
关键词
仔猪
早期断奶
蛋白水平
豆饼用量
饲料
Early-weanling, Piglets,Corn-soybean-meal diet,Protein level,SBMProportion
